![]() What is the Lagrange error bound Basically, it’s a theoretical limit that measures. I was just wondering if this is the correct way to calculate the error bound, since I've seen examples where they would take the derivative and find critical points and then I would get lost. View Notes - Lagrange Error Bound.docx from MATH 101 at Mill Creek High School. Then that means you can write the abs value expression. Remember that the correction power series should then have a non-zero coefficient by hypothesis. Plugging in $x=1.4$ in the formula above gives us $1.461899$. So you can write the polynomial as the sum of two power series - one of them being the Taylor polynomial (call it Pn) and the other one being the exact 'correction power series' (call it Pc). I will do the part with all three points and you can do the other with two points.
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